Pass Cisco 300-515 Actual Free Exam Q&As Updated Dump Dec 02, 2023
Latest 300-515 Actual Free Exam Updated 87 Questions
NEW QUESTION # 31
An engineer is troubleshooting an ongoing network outage. Which command should he use that can display the live log files for a process or service running on a network device?
- A. ping
- B. show run
- C. debug
- D. traceroute
Answer: C
NEW QUESTION # 32
Refer to the exhibit.
While provisioning a new BGP session between the PE and CE router, you issue the as- override command.
Which statement describes modification of the prefix before being sent to the CE router (10.10.10.1)?
- A. The second and third autonomous systems change.
- B. The fourth AS changes, but no other autonomous systems change.
- C. The first and fourth autonomous systems change.
- D. The first AS changes, but no other autonomous systems change.
Answer: D
NEW QUESTION # 33
An engineer noticed that PE3 is failing to accept IPv6 traffic information from PE1.
The engineer confirmed that both PE3 and PE1 routers are configured accurately with IPv6 protocol.
To eliminate IPv6 traffic loss issue, which action must the engineer take to solve the problem?
- A. Configure 6PE forwarding between 6PE routers based on the IPv6 header
- B. Allow PE routers use the MP-iBGP extensions in the IPv6 network configuration to exchange IPv6 reachability information.
- C. Disable 6PVE that provides local IPv6 reachability over MPLS.
- D. Configure 6PE that provides global IPv6 reachability over IPv4 MPLS
Answer: D
NEW QUESTION # 34
Refer to the exhibit.
A technician is troubleshooting a connectivity issue and notices that there is no IS-IS adjacency between R1 and R2. What can the technician change to bring the IS-IS adjacency up?
- A. Change R2's configuration to no longer set the overload bit.
- B. Change R1's is-type to level-2-only
- C. Change R1's net address to be in the same area as R2.
- D. Change R2's net address to be in the same area as R1.
Answer: B
NEW QUESTION # 35
Refer to the exhibit. Which statement about this configuration is true?
- A. The MVRF must be configured on each router on the customer and service provider networks.
- B. Router 1 will accept multicast routes with a route-target of 12:1.
- C. Router 1 has statically defined thresholds for data MDT.
- D. 192.168.1.2 must be reachable by all routers participating in the mvpn-intranet MVRF.
Answer: B
NEW QUESTION # 36
Refer to the exhibit. An engineer is implementing an MPLS P2MP TE solution.
Which type of router can serve as the midpoint router and the tailend router in this P2MP TE network implementation?
- A. bud
- B. transit
- C. source
- D. headend
Answer: A
NEW QUESTION # 37
What must match in the EVPN and L2VPN configuration mode when configuring EVPN native in a router?
- A. interface
- B. bridge domain
- C. EVI
- D. address family
Answer: C
Explanation:
Section: Layer 2 VPNs
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k-r6-2/lxvpn/configuration/ guide/b-l2vpn-cg-asr9000-62x/b-l2vpn-cg-asr9000-62x_chapter_01011.html
NEW QUESTION # 38
Which condition must be met before an environment can support CSC?
- A. The CSC-CE must support OSPFv3.
- B. The CSC-PE and CSC-CE must each be able to ping an interface in its respective global routing table.
- C. The CSC-PE and the CSC-CE must support IPv6.
- D. The CSC-PE and CSC-CE devices must be able to send labels to one another using BGP.
Answer: D
NEW QUESTION # 39
Which two BGP attributes prevent loops in a route reflector environment? (Choose two.)
- A. cluster ID
- B. originator ID
- C. AS_PATH
- D. local preference
- E. origin
Answer: A,B
Explanation:
Reference: https://www.ciscopress.com/articles/article.asp?p=2756480&seqNum=10
NEW QUESTION # 40
Refer to the exhibit.
A network operator is implementing EVPN IRB on PE1. Which two command placements enable the advertisement of Type 2 routes and what information do Type 2 routes contain? (Choose two.)
- A. Type 2 routes contain Ethernet Auto-Discovery information.
- B. The operator adds in "host-routing" under the VRF EVPN.
- C. Type 2 routes contain inclusive source-specific multicast route information.
- D. Type 2 routes contain MAC/IP information.
- E. The operator adds in "host-routing" under the BVI651 interface.
Answer: D,E
Explanation:
Reference: https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/vpn/61x/b-ncs5500-l2vpn-configuration-guide-61x/b-ncs5500-l2vpn-configuration-guide-61x_chapter_01010.html
NEW QUESTION # 41
Which option is used as a loop prevention mechanism to support MPLS VPN customers with multihomed sites?
- A. allowas-in
- B. AS override
- C. SOO extended BGP community
- D. sham links
- E. BGP down bit
Answer: C
NEW QUESTION # 42
What do EVPN single-active and all-active have in common?
- A. They are used to provide single connection from a CE device to a service provider.
- B. They are both roles that a designated router can take when MPLS is used with EVPN.
- C. They are default gateway redundancy options.
- D. They are multihoming mechanisms used for CE devices.
Answer: B
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k-r6-2/lxvpn/configuration/ guide/b-l2vpn-cg-asr9000-62x/b-l2vpn-cg-asr9000-62x_chapter_01011.html
NEW QUESTION # 43
Drag and drop the EVPN components from the left onto the correct planes on the right.
Answer:
Explanation:
Explanation
Reference:
https://www.cisco.com/c/dam/m/en_us/network-intelligence/service-provider/digital-transformation/ knowledge-network-webinars/pdfs/0420-epn-ckn.pdf slide 8
NEW QUESTION # 44
Which is the primary function of a MPLS L3 VPN route target?
- A. It imports the external routes it identifies into VRFs that support Internet traffic
- B. It uniquely identifies NLRIs that have the same numeric value.
- C. It supports QoS by classifying traffic by file type when it applies MPLS EXP bits to each packet.
- D. It imports and exports identified routes into selected VRFs.
Answer: D
NEW QUESTION # 45
Refer to the exhibit. Router 1 is a P router in the ISP MPLS core.
A connected P router cannot generate an MPLS label for the router 1 loopback0 interface.
Which action resolves this issue?
- A. The loopback0 interface must be in OSPF area 0.
- B. A static route to null 0 must be added for the loopback interface and then static routes must be redistributed into OSPF
- C. The network statement under the routing process must have a wildcard mask of 0 0.0 255.
- D. The OSPF network type must be changed on loopback0 to point-to-point
Answer: C
NEW QUESTION # 46
In Layer 3 MPLS VPN implementations, if some of the VPNv4 routes on one PE router do not appear on another PE router, what could be the problem?
- A. RD export and import configuration errors
- B. RT export and import configuration errors
- C. RD mismatch between the PE routers
- D. VRF name mismatch between the PE routers
Answer: B
Explanation:
Reference:
http://blog.initialdraft.com/archives/1537/
NEW QUESTION # 47
The CTO of a company requires the support of a network consultant to deliver an MPLS solution without resigning to a certain degree of redundancy and scalability. Which solution effectively scales to hundreds or thousands of sites?
- A. L2VPN with the broadcast traffic processed at the ingress PE.
- B. L2VPN by encapsulating multiple frame formats with interworking.
- C. L3VPN with direct LSP connectivity between all PEs.
- D. L3VPN using a hierarchical topology of N-PEs and U-PEs.
Answer: D
NEW QUESTION # 48
With Layer 3 MPLS VPN implementations on Cisco IOS XR PE routers, an interface is assigned to a VRF using the vrf command in which configuration mode?
- A. RP/0/RP0/CPU0:PE(config-vrf)#
- B. RP/0/RP0/CPU0:PE(config-if)#
- C. RP/0/RP0/CPU0:PE(config-bgp)#
- D. RP/0/RP0/CPU0:PE(config-bgp-af)#
Answer: B
NEW QUESTION # 49
Which option is the primary purpose of central service MPLS VPNs?
- A. provide customer access to provider resources while ensuring customers cannot communicate directly
- B. provide other service providers access to provider resources
- C. provide other service providers access to customer resources
- D. provide the provider access to customer resources while ensuring customers cannot communicate directly
Answer: A
NEW QUESTION # 50
The network engineering group of a large ISP needs to harden the management plane of its Cisco 9000 Series ASRs. While addressing IPv6 ICMP issues, they realized they have to limit the rate at which IPv6 ICMP error messages are sent out on the network. Which command do they need to apply?
- A. ipv6 rate-limit 1000
- B. icmp ipv4 rate-limit unreachable 1000
- C. icmp ipv6 rate-limit unreachable 1000
- D. ipv6 icmp error-interval 50 20
Answer: D
Explanation:
Section: IPv6 VPNs
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/xe-3s/ip6b-xe-3s- book/ip6-icmp-rate-lmt-xe.html
NEW QUESTION # 51
Which BGP feature causes to replace the AS number of originating router with the AS number of the sending router?
- A. route dampening
- B. confederations
- C. AS override
- D. route reflectors
Answer: C
Explanation:
Reference:
<https://community.cisco.com/t5/networking-documents/understanding-bgp-as-override-feature/ta- p/3111967>
NEW QUESTION # 52
An ISP provides a major client MPLS VPN for managed services. The MPLS engineering team needs to use the advanced VPN feature of selective VRF import so that only specific prefixes are present in the required VPNs.
Which aspect of this feature must the team consider?
- A. The routers that are imported in the VRF can be BGP and IGP routes, so other match conditions in the route map, besides communities, can be used.
- B. A route is imported into the VRF only when at least one RT that is attached to the route matches one RT that is configured in the VRF and the route is permitted by the import route map.
- C. A route must pass the import route map first and then the route target import filter.
- D. The import-map command is applied under the PE interface that connects to the CE router.
Answer: B
Explanation:
Section: VPN Architecture
Explanation/Reference: https://www.ccexpert.us/mpls/configuring-selective-vrf-import.html
NEW QUESTION # 53
You are troubleshooting ARP connectivity issues for an Ethernet interface on an IOS XR network that runs IS-IS. You verify that the IGP protocol is running, but an ARP entry has not yet been created.
Which action should you take?
- A. ping the connected neighbor
- B. verify the RIB table routes
- C. debug ping packets
- D. debug ARP
Answer: A
Explanation:
Section: VPN Architecture
NEW QUESTION # 54
Which two are characteristics of using a non-MPLS peer-to-peer model over a traditional overlay model?
(Choose two.)
- A. Routing information is exchanged between the customer router and one or a few PEs.
- B. The configuration on a newly added site PE is updated automatically.
- C. The model is suited for nonredundant configurations.
- D. Provider routers know the customer network topology.
- E. The customer specifies the exact site-to-site traffic profile.
Answer: A,D
Explanation:
Section: VPN Architecture
Explanation/Reference: http://etutorials.org/Networking/MPLS+VPN+Architectures/Part+2+MPLS-based+Virtual+Private
+Networks/Chapter+7.+Virtual+Private+Network+VPN+Implementation+Options/Overlay+and+Peer-to- peer+VPN+Model/
NEW QUESTION # 55
Refer to the exhibit:
A network engineer is implementing an OSPF configuration Based on the output, which statement is true?
- A. OSPFv3 cannot be configured for IPv4; OSPFv3 works only for IPv6.
- B. OSPFv3 does not run for IPv4 on FastEthemet0/0 until IPv6 routing is enabled on the router and IPv6 is enabled on interface Fastfc.thernet0/0
- C. In the ospfv3 1 area 1 ipv4 command, area 0 must be configured instead of area 1.
- D. IPv6 routing not enabled" is just an informational message and OSPFv3 runs for IPv4 on interface FastEthernet0/0 anyway
Answer: B
NEW QUESTION # 56
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